---
id: CVE-2026-85582
title: >-
  SiYuan versions before v3.8.2 contain an unbounded session creation
  vulnerability in the publish-service Basic Auth handler that allows
  authenticated attackers to exhaust memory
summary: >-
  SiYuan versions before v3.8.2 contain an unbounded session creation
  vulnerability in the publish-service Basic Auth handler that allows
  authenticated attackers to exhaust memory. Attackers can repeatedly
  authenticate with valid credentia…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-770
published: '2026-09-04'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:05:53.177'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85582'
references:
  - url: >-
      https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f4vj-ppp2-5hg4
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/siyuan-before-3.8.2-unbounded-session-creation-via-basic-auth
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f4vj-ppp2-5hg4
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00371
epssPercentile: 0.30826
ingestedAt: '2026-09-08T20:10:03.164Z'
---

## Overview

SiYuan versions before v3.8.2 contain an unbounded session creation vulnerability in the publish-service Basic Auth handler that allows authenticated attackers to exhaust memory. Attackers can repeatedly authenticate with valid credentials to create persistent session entries without expiry or capacity limits, causing indefinite process memory growth and denial of service.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.